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Research Letters in Materials Science
Volume 2008, Article ID 368985, 4 pages
http://dx.doi.org/10.1155/2008/368985
Research Letter

Biomimetic Composite-Metal Hip Resurfacing Implant

Department of Mechanical and Industrial Engineering, Ryerson University, ON, Canada M5B 2K3

Received 7 April 2008; Accepted 18 June 2008

Academic Editor: Steve J. Bull

Copyright © 2008 Habiba Bougherara and Martin N. Bureau. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Hip resurfacing technique is a conservative arthroplasty used in the young patient in which the femoral head is reshaped to accept metal cap with small guide stem. In the present investigation, a hybrid composite-metal resurfacing implant is proposed. The cup is made of carbon fiber/polyamide 12 (CF/PA12) covered with a thin layer of cobalt chrome (Co-Cr). Finite element (FE) method was applied to analyze and compare the biomechanical performances of the hybrid hip resurfacing (HHR) and the conventional Birmingham (BHR). Results of the finite element analysis showed that the composite implant leads to an increase in stresses in the cancellous bone by more than 15% than BHR, indicating a lower potential for stress shielding and bone fracture and higher potential for bone apposition with the HHR.